[thirdparty/systemd.git] / src / network / networkd-dhcp4.c

/***
  This file is part of systemd.

  Copyright 2013-2014 Tom Gundersen <teg@jklm.no>

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <netinet/ether.h>
#include <linux/if.h>

#include "alloc-util.h"
#include "dhcp-lease-internal.h"
#include "hostname-util.h"
#include "network-internal.h"
#include "networkd-link.h"

static int dhcp4_route_handler(sd_netlink *rtnl, sd_netlink_message *m,
                               void *userdata) {
        _cleanup_link_unref_ Link *link = userdata;
        int r;

        assert(link);
        assert(link->dhcp4_messages > 0);

        link->dhcp4_messages--;

        r = sd_netlink_message_get_errno(m);
        if (r < 0 && r != -EEXIST) {
                log_link_error_errno(link, r, "Could not set DHCPv4 route: %m");
                link_enter_failed(link);
        }

        if (link->dhcp4_messages == 0) {
                link->dhcp4_configured = true;
                link_check_ready(link);
        }

        return 1;
}

static int link_set_dhcp_routes(Link *link) {
        struct in_addr gateway;
        _cleanup_free_ sd_dhcp_route **static_routes = NULL;
        int r, n, i;

        assert(link);
        assert(link->dhcp_lease);

        r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
        if (r < 0 && r != -ENODATA)
                return log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m");

        if (r >= 0) {
                struct in_addr address;
                _cleanup_route_free_ Route *route = NULL;
                _cleanup_route_free_ Route *route_gw = NULL;

                r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
                if (r < 0)
                        return log_link_warning_errno(link, r, "DHCP error: could not get address: %m");

                r = route_new(&route);
                if (r < 0)
                        return log_link_error_errno(link, r, "Could not allocate route: %m");

                route->protocol = RTPROT_DHCP;

                r = route_new(&route_gw);
                if (r < 0)
                        return log_link_error_errno(link, r,  "Could not allocate route: %m");

                /* The dhcp netmask may mask out the gateway. Add an explicit
                 * route for the gw host so that we can route no matter the
                 * netmask or existing kernel route tables. */
                route_gw->family = AF_INET;
                route_gw->dst.in = gateway;
                route_gw->dst_prefixlen = 32;
                route_gw->prefsrc.in = address;
                route_gw->scope = RT_SCOPE_LINK;
                route_gw->protocol = RTPROT_DHCP;
                route_gw->priority = link->network->dhcp_route_metric;

                r = route_configure(route_gw, link, &dhcp4_route_handler);
                if (r < 0)
                        return log_link_warning_errno(link, r, "Could not set host route: %m");

                link->dhcp4_messages++;

                route->family = AF_INET;
                route->gw.in = gateway;
                route->prefsrc.in = address;
                route->priority = link->network->dhcp_route_metric;

                r = route_configure(route, link, &dhcp4_route_handler);
                if (r < 0) {
                        log_link_warning_errno(link, r, "Could not set routes: %m");
                        link_enter_failed(link);
                        return r;
                }

                link->dhcp4_messages++;
        }

        n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);
        if (n == -ENODATA)
                return 0;
        if (n < 0)
                return log_link_warning_errno(link, n, "DHCP error: could not get routes: %m");

        for (i = 0; i < n; i++) {
                _cleanup_route_free_ Route *route = NULL;

                r = route_new(&route);
                if (r < 0)
                        return log_link_error_errno(link, r, "Could not allocate route: %m");

                route->family = AF_INET;
                route->protocol = RTPROT_DHCP;
                assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0);
                assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0);
                assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0);
                route->priority = link->network->dhcp_route_metric;

                r = route_configure(route, link, &dhcp4_route_handler);
                if (r < 0)
                        return log_link_warning_errno(link, r, "Could not set host route: %m");

                link->dhcp4_messages++;
        }

        return 0;
}

static int dhcp_lease_lost(Link *link) {
        _cleanup_address_free_ Address *address = NULL;
        struct in_addr addr;
        struct in_addr netmask;
        struct in_addr gateway;
        unsigned prefixlen = 0;
        int r;

        assert(link);
        assert(link->dhcp_lease);

        log_link_warning(link, "DHCP lease lost");

        if (link->network->dhcp_use_routes) {
                _cleanup_free_ sd_dhcp_route **routes = NULL;
                int n, i;

                n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes);
                if (n >= 0) {
                        for (i = 0; i < n; i++) {
                                _cleanup_route_free_ Route *route = NULL;

                                r = route_new(&route);
                                if (r >= 0) {
                                        route->family = AF_INET;
                                        assert_se(sd_dhcp_route_get_gateway(routes[i], &route->gw.in) >= 0);
                                        assert_se(sd_dhcp_route_get_destination(routes[i], &route->dst.in) >= 0);
                                        assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &route->dst_prefixlen) >= 0);

                                        route_remove(route, link,
                                                   &link_route_remove_handler);
                                }
                        }
                }
        }

        r = address_new(&address);
        if (r >= 0) {
                r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
                if (r >= 0) {
                        _cleanup_route_free_ Route *route_gw = NULL;
                        _cleanup_route_free_ Route *route = NULL;

                        r = route_new(&route_gw);
                        if (r >= 0) {
                                route_gw->family = AF_INET;
                                route_gw->dst.in = gateway;
                                route_gw->dst_prefixlen = 32;
                                route_gw->scope = RT_SCOPE_LINK;

                                route_remove(route_gw, link,
                                           &link_route_remove_handler);
                        }

                        r = route_new(&route);
                        if (r >= 0) {
                                route->family = AF_INET;
                                route->gw.in = gateway;

                                route_remove(route, link,
                                           &link_route_remove_handler);
                        }
                }

                r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr);
                if (r >= 0) {
                        r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
                        if (r >= 0)
                                prefixlen = in_addr_netmask_to_prefixlen(&netmask);

                        address->family = AF_INET;
                        address->in_addr.in = addr;
                        address->prefixlen = prefixlen;

                        address_remove(address, link, &link_address_remove_handler);
                }
        }

        if (link->network->dhcp_use_mtu) {
                uint16_t mtu;

                r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu);
                if (r >= 0 && link->original_mtu != mtu) {
                        r = link_set_mtu(link, link->original_mtu);
                        if (r < 0) {
                                log_link_warning(link,
                                                 "DHCP error: could not reset MTU");
                                link_enter_failed(link);
                                return r;
                        }
                }
        }

        if (link->network->dhcp_use_hostname) {
                const char *hostname = NULL;

                if (link->network->dhcp_hostname)
                        hostname = link->network->dhcp_hostname;
                else
                        (void) sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname);

                if (hostname) {
                        /* If a hostname was set due to the lease, then unset it now. */
                        r = link_set_hostname(link, NULL);
                        if (r < 0)
                                log_link_warning_errno(link, r, "Failed to reset transient hostname: %m");
                }
        }

        link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
        link_dirty(link);
        link->dhcp4_configured = false;

        return 0;
}

static int dhcp4_address_handler(sd_netlink *rtnl, sd_netlink_message *m,
                                 void *userdata) {
        _cleanup_link_unref_ Link *link = userdata;
        int r;

        assert(link);

        r = sd_netlink_message_get_errno(m);
        if (r < 0 && r != -EEXIST) {
                log_link_error_errno(link, r, "Could not set DHCPv4 address: %m");
                link_enter_failed(link);
        } else if (r >= 0)
                manager_rtnl_process_address(rtnl, m, link->manager);

        link_set_dhcp_routes(link);

        return 1;
}

static int dhcp4_update_address(Link *link,
                                struct in_addr *address,
                                struct in_addr *netmask,
                                uint32_t lifetime) {
        _cleanup_address_free_ Address *addr = NULL;
        unsigned prefixlen;
        int r;

        assert(address);
        assert(netmask);
        assert(lifetime);

        prefixlen = in_addr_netmask_to_prefixlen(netmask);

        r = address_new(&addr);
        if (r < 0)
                return r;

        addr->family = AF_INET;
        addr->in_addr.in.s_addr = address->s_addr;
        addr->cinfo.ifa_prefered = lifetime;
        addr->cinfo.ifa_valid = lifetime;
        addr->prefixlen = prefixlen;
        addr->broadcast.s_addr = address->s_addr | ~netmask->s_addr;

        /* allow reusing an existing address and simply update its lifetime
         * in case it already exists */
        r = address_configure(addr, link, &dhcp4_address_handler, true);
        if (r < 0)
                return r;

        return 0;
}

static int dhcp_lease_renew(sd_dhcp_client *client, Link *link) {
        sd_dhcp_lease *lease;
        struct in_addr address;
        struct in_addr netmask;
        uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
        int r;

        assert(link);
        assert(client);
        assert(link->network);

        r = sd_dhcp_client_get_lease(client, &lease);
        if (r < 0)
                return log_link_warning_errno(link, r, "DHCP error: no lease: %m");

        sd_dhcp_lease_unref(link->dhcp_lease);
        link->dhcp4_configured = false;
        link->dhcp_lease = sd_dhcp_lease_ref(lease);
        link_dirty(link);

        r = sd_dhcp_lease_get_address(lease, &address);
        if (r < 0)
                return log_link_warning_errno(link, r, "DHCP error: no address: %m");

        r = sd_dhcp_lease_get_netmask(lease, &netmask);
        if (r < 0)
                return log_link_warning_errno(link, r, "DHCP error: no netmask: %m");

        if (!link->network->dhcp_critical) {
                r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime);
                if (r < 0)
                        return log_link_warning_errno(link, r, "DHCP error: no lifetime: %m");
        }

        r = dhcp4_update_address(link, &address, &netmask, lifetime);
        if (r < 0) {
                log_link_warning_errno(link, r, "Could not update IP address: %m");
                link_enter_failed(link);
                return r;
        }

        return 0;
}

static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) {
        sd_dhcp_lease *lease;
        struct in_addr address;
        struct in_addr netmask;
        struct in_addr gateway;
        unsigned prefixlen;
        uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
        int r;

        assert(client);
        assert(link);

        r = sd_dhcp_client_get_lease(client, &lease);
        if (r < 0)
                return log_link_error_errno(link, r, "DHCP error: No lease: %m");

        r = sd_dhcp_lease_get_address(lease, &address);
        if (r < 0)
                return log_link_error_errno(link, r, "DHCP error: No address: %m");

        r = sd_dhcp_lease_get_netmask(lease, &netmask);
        if (r < 0)
                return log_link_error_errno(link, r, "DHCP error: No netmask: %m");

        prefixlen = in_addr_netmask_to_prefixlen(&netmask);

        r = sd_dhcp_lease_get_router(lease, &gateway);
        if (r < 0 && r != -ENODATA)
                return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m");

        if (r >= 0)
                log_struct(LOG_INFO,
                           LOG_LINK_INTERFACE(link),
                           LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
                                            ADDRESS_FMT_VAL(address),
                                            prefixlen,
                                            ADDRESS_FMT_VAL(gateway)),
                           "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
                           "PREFIXLEN=%u", prefixlen,
                           "GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(gateway),
                           NULL);
        else
                log_struct(LOG_INFO,
                           LOG_LINK_INTERFACE(link),
                           LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u",
                                            ADDRESS_FMT_VAL(address),
                                            prefixlen),
                           "ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
                           "PREFIXLEN=%u", prefixlen,
                           NULL);

        link->dhcp_lease = sd_dhcp_lease_ref(lease);
        link_dirty(link);

        if (link->network->dhcp_use_mtu) {
                uint16_t mtu;

                r = sd_dhcp_lease_get_mtu(lease, &mtu);
                if (r >= 0) {
                        r = link_set_mtu(link, mtu);
                        if (r < 0)
                                log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu);
                }
        }

        if (link->network->dhcp_use_hostname) {
                const char *hostname = NULL;

                if (link->network->dhcp_hostname)
                        hostname = link->network->dhcp_hostname;
                else
                        (void) sd_dhcp_lease_get_hostname(lease, &hostname);

                if (hostname) {
                        r = link_set_hostname(link, hostname);
                        if (r < 0)
                                log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname);
                }
        }

        if (link->network->dhcp_use_timezone) {
                const char *tz = NULL;

                (void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);

                if (tz) {
                        r = link_set_timezone(link, tz);
                        if (r < 0)
                                log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz);
                }
        }

        if (!link->network->dhcp_critical) {
                r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime);
                if (r < 0) {
                        log_link_warning_errno(link, r, "DHCP error: no lifetime: %m");
                        return r;
                }
        }

        r = dhcp4_update_address(link, &address, &netmask, lifetime);
        if (r < 0) {
                log_link_warning_errno(link, r, "Could not update IP address: %m");
                link_enter_failed(link);
                return r;
        }

        return 0;
}
static void dhcp4_handler(sd_dhcp_client *client, int event, void *userdata) {
        Link *link = userdata;
        int r = 0;

        assert(link);
        assert(link->network);
        assert(link->manager);

        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
                return;

        switch (event) {
                case SD_DHCP_CLIENT_EVENT_EXPIRED:
                case SD_DHCP_CLIENT_EVENT_STOP:
                case SD_DHCP_CLIENT_EVENT_IP_CHANGE:
                        if (link->network->dhcp_critical) {
                                log_link_error(link, "DHCPv4 connection considered system critical, ignoring request to reconfigure it.");
                                return;
                        }

                        if (link->dhcp_lease) {
                                r = dhcp_lease_lost(link);
                                if (r < 0) {
                                        link_enter_failed(link);
                                        return;
                                }
                        }

                        if (event == SD_DHCP_CLIENT_EVENT_IP_CHANGE) {
                                r = dhcp_lease_acquired(client, link);
                                if (r < 0) {
                                        link_enter_failed(link);
                                        return;
                                }
                        }

                        break;
                case SD_DHCP_CLIENT_EVENT_RENEW:
                        r = dhcp_lease_renew(client, link);
                        if (r < 0) {
                                link_enter_failed(link);
                                return;
                        }
                        break;
                case SD_DHCP_CLIENT_EVENT_IP_ACQUIRE:
                        r = dhcp_lease_acquired(client, link);
                        if (r < 0) {
                                link_enter_failed(link);
                                return;
                        }
                        break;
                default:
                        if (event < 0)
                                log_link_warning_errno(link, event, "DHCP error: Client failed: %m");
                        else
                                log_link_warning(link, "DHCP unknown event: %i", event);
                        break;
        }

        return;
}

int dhcp4_configure(Link *link) {
        int r;

        assert(link);
        assert(link->network);
        assert(link->network->dhcp & ADDRESS_FAMILY_IPV4);

        if (!link->dhcp_client) {
                r = sd_dhcp_client_new(&link->dhcp_client);
                if (r < 0)
                        return r;
        }

        r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
        if (r < 0)
                return r;

        r = sd_dhcp_client_set_mac(link->dhcp_client,
                                   (const uint8_t *) &link->mac,
                                   sizeof (link->mac), ARPHRD_ETHER);
        if (r < 0)
                return r;

        r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex);
        if (r < 0)
                return r;

        r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp4_handler, link);
        if (r < 0)
                return r;

        r = sd_dhcp_client_set_request_broadcast(link->dhcp_client,
                                                 link->network->dhcp_broadcast);
        if (r < 0)
                return r;

        if (link->mtu) {
                r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
                if (r < 0)
                        return r;
        }

        if (link->network->dhcp_use_mtu) {
                r = sd_dhcp_client_set_request_option(link->dhcp_client,
                                                      SD_DHCP_OPTION_INTERFACE_MTU);
                if (r < 0)
                        return r;
        }

        if (link->network->dhcp_use_routes) {
                r = sd_dhcp_client_set_request_option(link->dhcp_client,
                                                      SD_DHCP_OPTION_STATIC_ROUTE);
                if (r < 0)
                        return r;
                r = sd_dhcp_client_set_request_option(link->dhcp_client,
                                                      SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE);
                if (r < 0)
                        return r;
        }

        /* Always acquire the timezone and NTP */
        r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NTP_SERVER);
        if (r < 0)
                return r;

        r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NEW_TZDB_TIMEZONE);
        if (r < 0)
                return r;

        if (link->network->dhcp_send_hostname) {
                _cleanup_free_ char *hostname = NULL;
                const char *hn = NULL;

                if (!link->network->dhcp_hostname) {
                        hostname = gethostname_malloc();
                        if (!hostname)
                                return -ENOMEM;

                        hn = hostname;
                } else
                        hn = link->network->dhcp_hostname;

                if (!is_localhost(hn)) {
                        r = sd_dhcp_client_set_hostname(link->dhcp_client, hn);
                        if (r < 0)
                                return r;
                }
        }

        if (link->network->dhcp_vendor_class_identifier) {
                r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client,
                                                               link->network->dhcp_vendor_class_identifier);
                if (r < 0)
                        return r;
        }

        switch (link->network->dhcp_client_identifier) {
        case DHCP_CLIENT_ID_DUID:
                /* If configured, apply user specified DUID and/or IAID */
                if (link->network->duid_type != _DUID_TYPE_INVALID)
                        r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
                                                         link->network->iaid,
                                                         link->network->dhcp_duid_type,
                                                         link->network->dhcp_duid,
                                                         link->network->dhcp_duid_len);
                else
                        r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
                                                         link->network->iaid,
                                                         link->manager->dhcp_duid_type,
                                                         link->manager->dhcp_duid,
                                                         link->manager->dhcp_duid_len);
                if (r < 0)
                        return r;
                break;
        case DHCP_CLIENT_ID_MAC:
                r = sd_dhcp_client_set_client_id(link->dhcp_client,
                                                 ARPHRD_ETHER,
                                                 (const uint8_t *) &link->mac,
                                                 sizeof (link->mac));
                if (r < 0)
                        return r;
                break;
        default:
                assert_not_reached("Unknown client identifier type.");
        }

        return 0;
}
Commit	Line	Data
3c9b8860 TG	1	/***
	2	This file is part of systemd.
	3
	4	Copyright 2013-2014 Tom Gundersen <teg@jklm.no>
	5
	6	systemd is free software; you can redistribute it and/or modify it
	7	under the terms of the GNU Lesser General Public License as published by
	8	the Free Software Foundation; either version 2.1 of the License, or
	9	(at your option) any later version.
	10
	11	systemd is distributed in the hope that it will be useful, but
	12	WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	Lesser General Public License for more details.
	15
	16	You should have received a copy of the GNU Lesser General Public License
	17	along with systemd; If not, see <http://www.gnu.org/licenses/>.
	18	***/
	19
	20	#include <netinet/ether.h>
	21	#include <linux/if.h>
	22
b5efdb8a LP	23	#include "alloc-util.h"
b5efdb8a LP	24	#include "dhcp-lease-internal.h"
958b66ea	25	#include "hostname-util.h"
3c9b8860	26	#include "network-internal.h"
b5efdb8a	27	#include "networkd-link.h"
3c9b8860	28
1c4baffc	29	static int dhcp4_route_handler(sd_netlink rtnl, sd_netlink_message m,
3c9b8860 TG	30	void *userdata) {
	31	_cleanup_link_unref_ Link *link = userdata;
	32	int r;
	33
	34	assert(link);
6cf4a01c	35	assert(link->dhcp4_messages > 0);
3c9b8860	36
313cefa1	37	link->dhcp4_messages--;
3c9b8860	38
1c4baffc	39	r = sd_netlink_message_get_errno(m);
3c9b8860	40	if (r < 0 && r != -EEXIST) {
f6b8196f	41	log_link_error_errno(link, r, "Could not set DHCPv4 route: %m");
3c9b8860 TG	42	link_enter_failed(link);
	43	}
	44
6cf4a01c	45	if (link->dhcp4_messages == 0) {
3c9b8860	46	link->dhcp4_configured = true;
8012cd39	47	link_check_ready(link);
3c9b8860 TG	48	}
	49
	50	return 1;
	51	}
	52
	53	static int link_set_dhcp_routes(Link *link) {
	54	struct in_addr gateway;
f8693fc7	55	_cleanup_free_ sd_dhcp_route **static_routes = NULL;
3c9b8860 TG	56	int r, n, i;
	57
	58	assert(link);
	59	assert(link->dhcp_lease);
	60
	61	r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
397d15fd	62	if (r < 0 && r != -ENODATA)
f6b8196f LP	63	return log_link_warning_errno(link, r, "DHCP error: could not get gateway: %m");
f6b8196f LP	64
3c9b8860	65	if (r >= 0) {
46b0c76e	66	struct in_addr address;
3c9b8860 TG	67	_cleanup_route_free_ Route *route = NULL;
	68	_cleanup_route_free_ Route *route_gw = NULL;
	69
46b0c76e	70	r = sd_dhcp_lease_get_address(link->dhcp_lease, &address);
f6b8196f LP	71	if (r < 0)
f6b8196f LP	72	return log_link_warning_errno(link, r, "DHCP error: could not get address: %m");
46b0c76e	73
ed9e361a	74	r = route_new(&route);
f6b8196f LP	75	if (r < 0)
f6b8196f LP	76	return log_link_error_errno(link, r, "Could not allocate route: %m");
3c9b8860	77
ed9e361a TG	78	route->protocol = RTPROT_DHCP;
	79
	80	r = route_new(&route_gw);
f6b8196f LP	81	if (r < 0)
f6b8196f LP	82	return log_link_error_errno(link, r, "Could not allocate route: %m");
3c9b8860 TG	83
	84	/* The dhcp netmask may mask out the gateway. Add an explicit
	85	* route for the gw host so that we can route no matter the
	86	* netmask or existing kernel route tables. */
	87	route_gw->family = AF_INET;
2ce40956	88	route_gw->dst.in = gateway;
3c9b8860	89	route_gw->dst_prefixlen = 32;
2ce40956	90	route_gw->prefsrc.in = address;
3c9b8860	91	route_gw->scope = RT_SCOPE_LINK;
ed9e361a	92	route_gw->protocol = RTPROT_DHCP;
86655331	93	route_gw->priority = link->network->dhcp_route_metric;
3c9b8860 TG	94
3c9b8860 TG	95	r = route_configure(route_gw, link, &dhcp4_route_handler);
f6b8196f LP	96	if (r < 0)
f6b8196f LP	97	return log_link_warning_errno(link, r, "Could not set host route: %m");
3c9b8860	98
313cefa1	99	link->dhcp4_messages++;
3c9b8860 TG	100
3c9b8860 TG	101	route->family = AF_INET;
2ce40956 TG	102	route->gw.in = gateway;
2ce40956 TG	103	route->prefsrc.in = address;
86655331	104	route->priority = link->network->dhcp_route_metric;
3c9b8860 TG	105
	106	r = route_configure(route, link, &dhcp4_route_handler);
	107	if (r < 0) {
f6b8196f	108	log_link_warning_errno(link, r, "Could not set routes: %m");
3c9b8860 TG	109	link_enter_failed(link);
	110	return r;
	111	}
	112
313cefa1	113	link->dhcp4_messages++;
3c9b8860 TG	114	}
	115
	116	n = sd_dhcp_lease_get_routes(link->dhcp_lease, &static_routes);
397d15fd	117	if (n == -ENODATA)
3c9b8860	118	return 0;
f6b8196f LP	119	if (n < 0)
f6b8196f LP	120	return log_link_warning_errno(link, n, "DHCP error: could not get routes: %m");
3c9b8860 TG	121
	122	for (i = 0; i < n; i++) {
	123	_cleanup_route_free_ Route *route = NULL;
	124
ed9e361a	125	r = route_new(&route);
f6b8196f LP	126	if (r < 0)
f6b8196f LP	127	return log_link_error_errno(link, r, "Could not allocate route: %m");
3c9b8860 TG	128
3c9b8860 TG	129	route->family = AF_INET;
ed9e361a	130	route->protocol = RTPROT_DHCP;
f8693fc7 BG	131	assert_se(sd_dhcp_route_get_gateway(static_routes[i], &route->gw.in) >= 0);
	132	assert_se(sd_dhcp_route_get_destination(static_routes[i], &route->dst.in) >= 0);
	133	assert_se(sd_dhcp_route_get_destination_prefix_length(static_routes[i], &route->dst_prefixlen) >= 0);
86655331	134	route->priority = link->network->dhcp_route_metric;
3c9b8860 TG	135
3c9b8860 TG	136	r = route_configure(route, link, &dhcp4_route_handler);
f6b8196f LP	137	if (r < 0)
f6b8196f LP	138	return log_link_warning_errno(link, r, "Could not set host route: %m");
3c9b8860	139
313cefa1	140	link->dhcp4_messages++;
3c9b8860 TG	141	}
	142
	143	return 0;
	144	}
	145
	146	static int dhcp_lease_lost(Link *link) {
	147	_cleanup_address_free_ Address *address = NULL;
	148	struct in_addr addr;
	149	struct in_addr netmask;
	150	struct in_addr gateway;
f414a269	151	unsigned prefixlen = 0;
3c9b8860 TG	152	int r;
	153
	154	assert(link);
	155	assert(link->dhcp_lease);
	156
79008bdd	157	log_link_warning(link, "DHCP lease lost");
3c9b8860	158
27cb34f5	159	if (link->network->dhcp_use_routes) {
f8693fc7	160	_cleanup_free_ sd_dhcp_route **routes = NULL;
3c9b8860 TG	161	int n, i;
	162
	163	n = sd_dhcp_lease_get_routes(link->dhcp_lease, &routes);
	164	if (n >= 0) {
	165	for (i = 0; i < n; i++) {
	166	_cleanup_route_free_ Route *route = NULL;
	167
ed9e361a	168	r = route_new(&route);
3c9b8860 TG	169	if (r >= 0) {
3c9b8860 TG	170	route->family = AF_INET;
f8693fc7 BG	171	assert_se(sd_dhcp_route_get_gateway(routes[i], &route->gw.in) >= 0);
	172	assert_se(sd_dhcp_route_get_destination(routes[i], &route->dst.in) >= 0);
	173	assert_se(sd_dhcp_route_get_destination_prefix_length(routes[i], &route->dst_prefixlen) >= 0);
3c9b8860	174
91b5f997 TG	175	route_remove(route, link,
91b5f997 TG	176	&link_route_remove_handler);
3c9b8860 TG	177	}
	178	}
	179	}
	180	}
	181
f0213e37	182	r = address_new(&address);
3c9b8860 TG	183	if (r >= 0) {
	184	r = sd_dhcp_lease_get_router(link->dhcp_lease, &gateway);
	185	if (r >= 0) {
	186	_cleanup_route_free_ Route *route_gw = NULL;
	187	_cleanup_route_free_ Route *route = NULL;
	188
ed9e361a	189	r = route_new(&route_gw);
3c9b8860 TG	190	if (r >= 0) {
3c9b8860 TG	191	route_gw->family = AF_INET;
2ce40956	192	route_gw->dst.in = gateway;
3c9b8860 TG	193	route_gw->dst_prefixlen = 32;
	194	route_gw->scope = RT_SCOPE_LINK;
	195
91b5f997 TG	196	route_remove(route_gw, link,
91b5f997 TG	197	&link_route_remove_handler);
3c9b8860 TG	198	}
3c9b8860 TG	199
ed9e361a	200	r = route_new(&route);
3c9b8860 TG	201	if (r >= 0) {
3c9b8860 TG	202	route->family = AF_INET;
2ce40956	203	route->gw.in = gateway;
3c9b8860	204
91b5f997 TG	205	route_remove(route, link,
91b5f997 TG	206	&link_route_remove_handler);
3c9b8860 TG	207	}
	208	}
	209
f414a269 TG	210	r = sd_dhcp_lease_get_address(link->dhcp_lease, &addr);
	211	if (r >= 0) {
	212	r = sd_dhcp_lease_get_netmask(link->dhcp_lease, &netmask);
	213	if (r >= 0)
	214	prefixlen = in_addr_netmask_to_prefixlen(&netmask);
3c9b8860	215
f414a269 TG	216	address->family = AF_INET;
	217	address->in_addr.in = addr;
	218	address->prefixlen = prefixlen;
3c9b8860	219
91b5f997	220	address_remove(address, link, &link_address_remove_handler);
f414a269	221	}
3c9b8860 TG	222	}
3c9b8860 TG	223
27cb34f5	224	if (link->network->dhcp_use_mtu) {
3c9b8860 TG	225	uint16_t mtu;
	226
	227	r = sd_dhcp_lease_get_mtu(link->dhcp_lease, &mtu);
	228	if (r >= 0 && link->original_mtu != mtu) {
	229	r = link_set_mtu(link, link->original_mtu);
	230	if (r < 0) {
79008bdd	231	log_link_warning(link,
3c9b8860 TG	232	"DHCP error: could not reset MTU");
	233	link_enter_failed(link);
	234	return r;
	235	}
	236	}
	237	}
	238
27cb34f5	239	if (link->network->dhcp_use_hostname) {
3c9b8860 TG	240	const char *hostname = NULL;
3c9b8860 TG	241
27cb34f5 LP	242	if (link->network->dhcp_hostname)
27cb34f5 LP	243	hostname = link->network->dhcp_hostname;
dce391e7 LP	244	else
dce391e7 LP	245	(void) sd_dhcp_lease_get_hostname(link->dhcp_lease, &hostname);
a7d0ef44	246
dce391e7 LP	247	if (hostname) {
	248	/* If a hostname was set due to the lease, then unset it now. */
	249	r = link_set_hostname(link, NULL);
3c9b8860	250	if (r < 0)
dce391e7	251	log_link_warning_errno(link, r, "Failed to reset transient hostname: %m");
3c9b8860 TG	252	}
	253	}
	254
	255	link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
6a3e5f6a	256	link_dirty(link);
3c9b8860 TG	257	link->dhcp4_configured = false;
	258
	259	return 0;
	260	}
	261
1c4baffc	262	static int dhcp4_address_handler(sd_netlink rtnl, sd_netlink_message m,
3c9b8860 TG	263	void *userdata) {
	264	_cleanup_link_unref_ Link *link = userdata;
	265	int r;
	266
	267	assert(link);
	268
1c4baffc	269	r = sd_netlink_message_get_errno(m);
3c9b8860	270	if (r < 0 && r != -EEXIST) {
f6b8196f	271	log_link_error_errno(link, r, "Could not set DHCPv4 address: %m");
3c9b8860	272	link_enter_failed(link);
45af44d4	273	} else if (r >= 0)
200a0868	274	manager_rtnl_process_address(rtnl, m, link->manager);
3c9b8860 TG	275
	276	link_set_dhcp_routes(link);
	277
	278	return 1;
	279	}
	280
	281	static int dhcp4_update_address(Link *link,
	282	struct in_addr *address,
	283	struct in_addr *netmask,
	284	uint32_t lifetime) {
	285	_cleanup_address_free_ Address *addr = NULL;
	286	unsigned prefixlen;
	287	int r;
	288
	289	assert(address);
	290	assert(netmask);
	291	assert(lifetime);
	292
	293	prefixlen = in_addr_netmask_to_prefixlen(netmask);
	294
f0213e37	295	r = address_new(&addr);
3c9b8860 TG	296	if (r < 0)
	297	return r;
	298
	299	addr->family = AF_INET;
	300	addr->in_addr.in.s_addr = address->s_addr;
	301	addr->cinfo.ifa_prefered = lifetime;
	302	addr->cinfo.ifa_valid = lifetime;
	303	addr->prefixlen = prefixlen;
	304	addr->broadcast.s_addr = address->s_addr \| ~netmask->s_addr;
	305
66669078 TG	306	/* allow reusing an existing address and simply update its lifetime
	307	* in case it already exists */
	308	r = address_configure(addr, link, &dhcp4_address_handler, true);
3c9b8860 TG	309	if (r < 0)
	310	return r;
	311
	312	return 0;
	313	}
	314
	315	static int dhcp_lease_renew(sd_dhcp_client client, Link link) {
	316	sd_dhcp_lease *lease;
	317	struct in_addr address;
	318	struct in_addr netmask;
	319	uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
	320	int r;
	321
	322	assert(link);
	323	assert(client);
	324	assert(link->network);
	325
	326	r = sd_dhcp_client_get_lease(client, &lease);
f6b8196f LP	327	if (r < 0)
f6b8196f LP	328	return log_link_warning_errno(link, r, "DHCP error: no lease: %m");
3c9b8860 TG	329
	330	sd_dhcp_lease_unref(link->dhcp_lease);
	331	link->dhcp4_configured = false;
e6b18ffa	332	link->dhcp_lease = sd_dhcp_lease_ref(lease);
6a3e5f6a	333	link_dirty(link);
3c9b8860 TG	334
3c9b8860 TG	335	r = sd_dhcp_lease_get_address(lease, &address);
f6b8196f LP	336	if (r < 0)
f6b8196f LP	337	return log_link_warning_errno(link, r, "DHCP error: no address: %m");
3c9b8860 TG	338
3c9b8860 TG	339	r = sd_dhcp_lease_get_netmask(lease, &netmask);
f6b8196f LP	340	if (r < 0)
f6b8196f LP	341	return log_link_warning_errno(link, r, "DHCP error: no netmask: %m");
3c9b8860 TG	342
3c9b8860 TG	343	if (!link->network->dhcp_critical) {
f6b8196f LP	344	r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime);
	345	if (r < 0)
	346	return log_link_warning_errno(link, r, "DHCP error: no lifetime: %m");
3c9b8860 TG	347	}
	348
	349	r = dhcp4_update_address(link, &address, &netmask, lifetime);
	350	if (r < 0) {
f6b8196f	351	log_link_warning_errno(link, r, "Could not update IP address: %m");
3c9b8860 TG	352	link_enter_failed(link);
	353	return r;
	354	}
	355
	356	return 0;
	357	}
	358
	359	static int dhcp_lease_acquired(sd_dhcp_client client, Link link) {
	360	sd_dhcp_lease *lease;
	361	struct in_addr address;
	362	struct in_addr netmask;
	363	struct in_addr gateway;
	364	unsigned prefixlen;
	365	uint32_t lifetime = CACHE_INFO_INFINITY_LIFE_TIME;
	366	int r;
	367
	368	assert(client);
	369	assert(link);
	370
	371	r = sd_dhcp_client_get_lease(client, &lease);
f2341e0a	372	if (r < 0)
f6b8196f	373	return log_link_error_errno(link, r, "DHCP error: No lease: %m");
3c9b8860 TG	374
3c9b8860 TG	375	r = sd_dhcp_lease_get_address(lease, &address);
f2341e0a	376	if (r < 0)
f6b8196f	377	return log_link_error_errno(link, r, "DHCP error: No address: %m");
3c9b8860 TG	378
3c9b8860 TG	379	r = sd_dhcp_lease_get_netmask(lease, &netmask);
f2341e0a	380	if (r < 0)
f6b8196f	381	return log_link_error_errno(link, r, "DHCP error: No netmask: %m");
3c9b8860 TG	382
	383	prefixlen = in_addr_netmask_to_prefixlen(&netmask);
	384
	385	r = sd_dhcp_lease_get_router(lease, &gateway);
397d15fd	386	if (r < 0 && r != -ENODATA)
f6b8196f	387	return log_link_error_errno(link, r, "DHCP error: Could not get gateway: %m");
3c9b8860 TG	388
3c9b8860 TG	389	if (r >= 0)
f2341e0a LP	390	log_struct(LOG_INFO,
	391	LOG_LINK_INTERFACE(link),
	392	LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u via %u.%u.%u.%u",
	393	ADDRESS_FMT_VAL(address),
	394	prefixlen,
	395	ADDRESS_FMT_VAL(gateway)),
	396	"ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
	397	"PREFIXLEN=%u", prefixlen,
	398	"GATEWAY=%u.%u.%u.%u", ADDRESS_FMT_VAL(gateway),
	399	NULL);
3c9b8860	400	else
f2341e0a LP	401	log_struct(LOG_INFO,
	402	LOG_LINK_INTERFACE(link),
	403	LOG_LINK_MESSAGE(link, "DHCPv4 address %u.%u.%u.%u/%u",
	404	ADDRESS_FMT_VAL(address),
	405	prefixlen),
	406	"ADDRESS=%u.%u.%u.%u", ADDRESS_FMT_VAL(address),
	407	"PREFIXLEN=%u", prefixlen,
	408	NULL);
3c9b8860	409
e6b18ffa	410	link->dhcp_lease = sd_dhcp_lease_ref(lease);
6a3e5f6a	411	link_dirty(link);
3c9b8860	412
27cb34f5	413	if (link->network->dhcp_use_mtu) {
3c9b8860 TG	414	uint16_t mtu;
	415
	416	r = sd_dhcp_lease_get_mtu(lease, &mtu);
	417	if (r >= 0) {
	418	r = link_set_mtu(link, mtu);
	419	if (r < 0)
f2341e0a	420	log_link_error_errno(link, r, "Failed to set MTU to %" PRIu16 ": %m", mtu);
3c9b8860 TG	421	}
	422	}
	423
27cb34f5	424	if (link->network->dhcp_use_hostname) {
49f6e11e	425	const char *hostname = NULL;
3c9b8860	426
27cb34f5 LP	427	if (link->network->dhcp_hostname)
27cb34f5 LP	428	hostname = link->network->dhcp_hostname;
dce391e7 LP	429	else
dce391e7 LP	430	(void) sd_dhcp_lease_get_hostname(lease, &hostname);
a7d0ef44	431
dce391e7	432	if (hostname) {
3c9b8860 TG	433	r = link_set_hostname(link, hostname);
3c9b8860 TG	434	if (r < 0)
f2341e0a	435	log_link_error_errno(link, r, "Failed to set transient hostname to '%s': %m", hostname);
3c9b8860 TG	436	}
	437	}
	438
27cb34f5	439	if (link->network->dhcp_use_timezone) {
21b80ad1 LP	440	const char *tz = NULL;
	441
	442	(void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
	443
	444	if (tz) {
	445	r = link_set_timezone(link, tz);
	446	if (r < 0)
	447	log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz);
	448	}
	449	}
	450
3c9b8860	451	if (!link->network->dhcp_critical) {
f2341e0a	452	r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime);
3c9b8860	453	if (r < 0) {
f2341e0a	454	log_link_warning_errno(link, r, "DHCP error: no lifetime: %m");
3c9b8860 TG	455	return r;
	456	}
	457	}
	458
	459	r = dhcp4_update_address(link, &address, &netmask, lifetime);
	460	if (r < 0) {
f2341e0a	461	log_link_warning_errno(link, r, "Could not update IP address: %m");
3c9b8860 TG	462	link_enter_failed(link);
	463	return r;
	464	}
	465
	466	return 0;
	467	}
	468	static void dhcp4_handler(sd_dhcp_client client, int event, void userdata) {
	469	Link *link = userdata;
	470	int r = 0;
	471
	472	assert(link);
	473	assert(link->network);
	474	assert(link->manager);
	475
	476	if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
	477	return;
	478
	479	switch (event) {
03748142 DH	480	case SD_DHCP_CLIENT_EVENT_EXPIRED:
	481	case SD_DHCP_CLIENT_EVENT_STOP:
	482	case SD_DHCP_CLIENT_EVENT_IP_CHANGE:
3c9b8860	483	if (link->network->dhcp_critical) {
f6b8196f	484	log_link_error(link, "DHCPv4 connection considered system critical, ignoring request to reconfigure it.");
3c9b8860 TG	485	return;
	486	}
	487
	488	if (link->dhcp_lease) {
	489	r = dhcp_lease_lost(link);
	490	if (r < 0) {
	491	link_enter_failed(link);
	492	return;
	493	}
	494	}
	495
03748142	496	if (event == SD_DHCP_CLIENT_EVENT_IP_CHANGE) {
3c9b8860 TG	497	r = dhcp_lease_acquired(client, link);
	498	if (r < 0) {
	499	link_enter_failed(link);
	500	return;
	501	}
	502	}
	503
	504	break;
03748142	505	case SD_DHCP_CLIENT_EVENT_RENEW:
3c9b8860 TG	506	r = dhcp_lease_renew(client, link);
	507	if (r < 0) {
	508	link_enter_failed(link);
	509	return;
	510	}
	511	break;
03748142	512	case SD_DHCP_CLIENT_EVENT_IP_ACQUIRE:
3c9b8860 TG	513	r = dhcp_lease_acquired(client, link);
	514	if (r < 0) {
	515	link_enter_failed(link);
	516	return;
	517	}
	518	break;
	519	default:
	520	if (event < 0)
f6b8196f	521	log_link_warning_errno(link, event, "DHCP error: Client failed: %m");
3c9b8860	522	else
f6b8196f	523	log_link_warning(link, "DHCP unknown event: %i", event);
3c9b8860 TG	524	break;
	525	}
	526
	527	return;
	528	}
	529
	530	int dhcp4_configure(Link *link) {
	531	int r;
	532
	533	assert(link);
	534	assert(link->network);
e0ee46f2	535	assert(link->network->dhcp & ADDRESS_FAMILY_IPV4);
3c9b8860	536
0bc70f1d TG	537	if (!link->dhcp_client) {
	538	r = sd_dhcp_client_new(&link->dhcp_client);
	539	if (r < 0)
	540	return r;
	541	}
3c9b8860 TG	542
	543	r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
	544	if (r < 0)
	545	return r;
	546
76253e73 DW	547	r = sd_dhcp_client_set_mac(link->dhcp_client,
	548	(const uint8_t *) &link->mac,
	549	sizeof (link->mac), ARPHRD_ETHER);
3c9b8860 TG	550	if (r < 0)
	551	return r;
	552
	553	r = sd_dhcp_client_set_index(link->dhcp_client, link->ifindex);
	554	if (r < 0)
	555	return r;
	556
	557	r = sd_dhcp_client_set_callback(link->dhcp_client, dhcp4_handler, link);
	558	if (r < 0)
	559	return r;
	560
	561	r = sd_dhcp_client_set_request_broadcast(link->dhcp_client,
	562	link->network->dhcp_broadcast);
	563	if (r < 0)
	564	return r;
	565
	566	if (link->mtu) {
	567	r = sd_dhcp_client_set_mtu(link->dhcp_client, link->mtu);
	568	if (r < 0)
	569	return r;
	570	}
	571
27cb34f5	572	if (link->network->dhcp_use_mtu) {
39745a5a	573	r = sd_dhcp_client_set_request_option(link->dhcp_client,
22805d92	574	SD_DHCP_OPTION_INTERFACE_MTU);
39745a5a LP	575	if (r < 0)
39745a5a LP	576	return r;
3c9b8860 TG	577	}
3c9b8860 TG	578
27cb34f5	579	if (link->network->dhcp_use_routes) {
3c9b8860	580	r = sd_dhcp_client_set_request_option(link->dhcp_client,
22805d92	581	SD_DHCP_OPTION_STATIC_ROUTE);
3c9b8860 TG	582	if (r < 0)
	583	return r;
	584	r = sd_dhcp_client_set_request_option(link->dhcp_client,
22805d92	585	SD_DHCP_OPTION_CLASSLESS_STATIC_ROUTE);
7d6884b6 TA	586	if (r < 0)
7d6884b6 TA	587	return r;
3c9b8860 TG	588	}
3c9b8860 TG	589
27cb34f5	590	/* Always acquire the timezone and NTP */
22805d92	591	r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NTP_SERVER);
4b7b5abb LP	592	if (r < 0)
	593	return r;
	594
22805d92	595	r = sd_dhcp_client_set_request_option(link->dhcp_client, SD_DHCP_OPTION_NEW_TZDB_TIMEZONE);
8eb9058d LP	596	if (r < 0)
	597	return r;
	598
27cb34f5	599	if (link->network->dhcp_send_hostname) {
3c9b8860	600	_cleanup_free_ char *hostname = NULL;
a7d0ef44 SS	601	const char *hn = NULL;
a7d0ef44 SS	602
27cb34f5	603	if (!link->network->dhcp_hostname) {
a7d0ef44 SS	604	hostname = gethostname_malloc();
	605	if (!hostname)
	606	return -ENOMEM;
3c9b8860	607
a7d0ef44 SS	608	hn = hostname;
a7d0ef44 SS	609	} else
27cb34f5	610	hn = link->network->dhcp_hostname;
3c9b8860	611
a7d0ef44 SS	612	if (!is_localhost(hn)) {
a7d0ef44 SS	613	r = sd_dhcp_client_set_hostname(link->dhcp_client, hn);
3c9b8860 TG	614	if (r < 0)
	615	return r;
	616	}
	617	}
	618
	619	if (link->network->dhcp_vendor_class_identifier) {
	620	r = sd_dhcp_client_set_vendor_class_identifier(link->dhcp_client,
	621	link->network->dhcp_vendor_class_identifier);
	622	if (r < 0)
	623	return r;
	624	}
	625
3e43b2cd JJ	626	switch (link->network->dhcp_client_identifier) {
3e43b2cd JJ	627	case DHCP_CLIENT_ID_DUID:
413708d1 VK	628	/* If configured, apply user specified DUID and/or IAID */
	629	if (link->network->duid_type != _DUID_TYPE_INVALID)
	630	r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
	631	link->network->iaid,
	632	link->network->dhcp_duid_type,
	633	link->network->dhcp_duid,
	634	link->network->dhcp_duid_len);
	635	else
	636	r = sd_dhcp_client_set_iaid_duid(link->dhcp_client,
	637	link->network->iaid,
	638	link->manager->dhcp_duid_type,
	639	link->manager->dhcp_duid,
	640	link->manager->dhcp_duid_len);
	641	if (r < 0)
	642	return r;
3e43b2cd JJ	643	break;
	644	case DHCP_CLIENT_ID_MAC:
	645	r = sd_dhcp_client_set_client_id(link->dhcp_client,
	646	ARPHRD_ETHER,
	647	(const uint8_t *) &link->mac,
	648	sizeof (link->mac));
	649	if (r < 0)
	650	return r;
	651	break;
	652	default:
	653	assert_not_reached("Unknown client identifier type.");
	654	}
	655
3c9b8860 TG	656	return 0;
3c9b8860 TG	657	}